IB Biology HL 3.2.15 Heart Structure and Flow Question Bank
Practise IB Biology HL 3.2.15 by interpreting heart diagrams and linking valves, chambers and pressure to directed blood flow.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Interpret labelled heart diagrams to identify chambers, valves and major vessels.
- Explain how pressure changes open valves and drive one-way flow through the heart.
B3.2.15 (HL)—Mammalian heart adaptations question 1
The diagram shows a section through a human heart with the chambers, valves and main blood vessels.
What are the functions of X and Y ?
A.
X
Y
To carry oxygenated blood to the
head and body
To prevent backflow into the aorta
when the ventricle relaxes
To carry oxygenated blood to the
head and body
To prevent backflow into the aorta
when the atrium relaxes
To carry deoxygenated blood to
the lungs
To prevent backflow into the atrium
when the ventricle contracts
To carry deoxygenated blood to
the lungs
To prevent backflow into the atrium
when the ventricle relaxes
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